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NGC 206 is an enormous star cloud located in the southwest part of the Andromeda Galaxy. In 1786, it was observed as a separate entity by William Herschel, who catalogued it as H V.36 (the 36th Category 5 [Very Large Nebulae] entry in his deep space catalog. Once categorized by Edwin Hubble as an open star cluster, NGC 206 is now considered to be an OB association. It contains over 300 members, many of which are young O and B type stars and spans about 4,000 light-years.